ChooseTypeAndAccountActivity: Fix the Null pointer Exception of monkey test

ChooseTypeAndAccountActivity crashed during monkey test, due to Null
pointer exception occurred.

To fix this issue, Add Null pointer check before we use it.

CRs-Fixed: 478250

Change-Id: Iae3e331edfda238ecb0c6d5d32b15329b1dfee0b
Merge "ChooseTypeAndAccountActivity: Fix the Null pointer Exception of monkey test" into kitkat3